Useful Namespaces
The System namespace (within the assembly with the same name) is the fundamental namespace that all Visual Studio .NET projects import by default. It contains the fundamental data type definitions, as well as utility classes and the fundamental class Exception and some of the commonly used exceptions. It also contains other specialized namespaces, some of which are discussed next. The most important ones for you in this book are highlighted in bold.
The System.Collections namespace contains the definitions for the most commonly used collection classes, such as arrays, lists, hash-tables, indexed lists, queues, stacks, and so on.
The System.Data namespace deals with data manipulation when interacting with external data storage, ...
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